Restrict acces to port based on client IPs

Hi,
This is hopefully a fairly straightforward newbie OS networkign question!
I want to configure a Solaris server such that access to a specified port is restricted to a defined small list of of client IP addresses. Ideally looking for a solution that works both on Solaris 9 and 10, and would use only standard Solaris options available on both these versions. But if this isn't possible, am open to all suggestions!
Thanks very much,
Adrian

Check out ipfilter
Supported on both versions, fits your requirements. Ideally though, you'd have access restricted by a perimeter firewall device and the services located behind it but you may not be able to. That way your networking security configuration is centralised.
hth.

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